Send Dermott somewhere else and then this trade probably gets the Hawks interested as Dermott would likely be viewed by the Hawks as negative value in the trade
It's funny how high Toronto fans are on Hagel, but when you say he's worth more, they start getting all up in arms. All the reasons that you want Hagel are the same reasons that he is worth more than what you are offering. If a trade where TOR gets Hagel happens, you will at the very least feel very uneasy about the assets you are giving up. If you propose a trade that you feel good about, it's probably not good enough.